Tool positioning gauge



June 2,2, 1948. 1 FERslPNG v TOOL POSITIONING GAUGE Filed No. 15, 1944 Patented June 22, 1948 TOUL PUSTENXNG GAUGE Leif ffersing, Springheld, Vt., assignor to .iones t Lamson Machine Company, Springfield, Vt., a corporation of Vermont application November l5, 1941i, Serial No. 563,501

' (ci. ca -iss) 2 Claims.

This invention relates to gages for assisting in the proper positioning of tools, particularly turning tools with relation to the work so that such tools may operate on the work most effectively. To this end the gage comprises a bar mounted for angular adjustment about the axis of the work and adjustable to project a gaging portion at the desired distance from that axis, the gaging portion having angularly related faces showing the proper positions of similar or complemental faces of a tool for operating on the work. If desired, the angularly related gage faces may be on p-ieces separate from the bar and adjustably fixed in relation thereto. A gage constructed in accordance with this invention may be mounted either on the work spindle carrier or on the tool holder as may be desired.

For a more complete understanding of this invention, reference may be had to the accompanying drawings in which:

Figures 1 and 2 are front and side elevations, respectively, of the gage, Figure 2 showing it partly broken away and in section as carried by a tool carrier.

Figure 3 is a fragmentary front elevation showing the gage in gaging relation to a tool for external turning.

Figure 4 is a View similar to Figure 3, but showing the gaging action for a tool arranged for internal cutting.

Figure 5 is a fragmentary front elevation showing adjustable external tool gaging elements.

Figure 6 is a detail section on line -i of Figure 5.

Figure 7 is a perspective View of one of the adjustable tool engaging elements employed in the construction of Figure 5.

Referring first to Figures l and 2, at l is indicated a support shown as having a threaded portion 2 which may be engaged in an internally threaded tube 3, this tube being arranged to be supported in any suitable manner coaxial with the work which is to be operated upon by the tool. Pivoted coaxially with the tube 3, as on the pivot thumb sc `ew 3a, is a gage element comprising a disk ll and a shank or dat bar 5 having a longitudinal slot 6 therethrough. This slot is arranged to have passed therethrough a screw 60 which is threaded into the disk li and serves to define an angular relation of the shank 5 to the disk i which is clamped in adjusted angular position by the screw 3a. One end of the shank 5 is formed with two angularly related faces l and The face 'l corresponds to the proper top rake angle of a tool 9 which it is desired lil to locate in its holder li? to cut external work at diameter indicated by the broken line a. The face is at the proper angle for the front clearance of the tool. One side of the shank may have length graduations indicated thereon cocooperating with an index line i5 0n the forward face of the support i, these indications being so arranged as to show to the workman the diameter of the work cut when the tool is positioned with its faces mating the faces l and 8 of the gage. Similarly the opposite end of the shank 5 may be provided with angularly related faces 2li and 2i, the face E@ lindicating the proper front clearance angle for a tool for internal cutting and the face Pi the proper top rake angle for this tool. it will be noted that the faces 'i and 8 are at angles complemental to the tool faces, the tool faces directly engaging the gage faces as shown in Figure 3. rIhe faces til and 2l, however, are identical with the tool faces when properly positioned, instead `of complemental thereto.

The internal cutting tool is shown at 25 in Figure e and when arranged as shown it is adapted to out an internal diameter shown by the broken arcuate line b, the diameter then being shown by the indications on the left side of the gage shank with reference to the index line 21.

While the manner of mounting of the tool may be chosen as desired, the construction shown is that of the multiple turning head fully shown and described in my application for United States Letters Patent Serial No. 563,602, filed November 15, 1944, for Multiple turning head.

Instead of employing a gage with xed angularly related gaging faces, its gaging faces may be formed on elements separate from the shank and adjustably related thereto. For example, in Figure 5 the external gaging faces 'la and 8a are formed on segments 3l] and 3l, respectively, which are seated in a segmental groove 32 in the edge of the shank 5a and are held in adjustable position by a clamp comprising a pair of clamping plates 35 on opposite faces of the shank 5a and secured together therethrough by the screw 36. These clamping 4plates are also provided with holes to receive a thumb screw 31 threaded into one of these plates 35 and passing through arcuate slots 33 in the segments 3D and 3l. When the segments have been adjusted to proper angular position, they are tightened in place by tightening the screw 3l.

Similarly in Figure 5 segments ,4e and 4l having faces 20a and 21a, respectively, may be provided and relatively adjusted corresponding to the tool faces 20 and 2l of Figure 1. These segments may be mounted similarly to the segments 3U and 3| and be used flor gaging internal cutting tools.

The use of separate adjustable disks permits adjustment for tool face angles suitable for tools of different type or operating on different materials. These disks may have angle graduations thereon to facilitate such adjustment.

From the foregoing description of embodiments of this invention it should be evident to those skilled in the art that various other changes and modifications might be made Without departing from the spirit or scope of this invention.

I claim:

1. A gage comprising a support having a pivot portion substantially coaxial with Work to be operated upon, a shank member mounted for pivotal and lengthwise adjustment on said pivot portion, said shank member having an arcuate groove therein, a pair of segments adjustably seated in said groove and having radial ends angularly spaced such that said ends may correspond to the top and front faces of a tool having the proper top rake and front clearance to operate on such Work, and means for :fixing said segments in adjusted angular position in said groove.

2. A gage comprising a support, a member, a pivot 'clamp screw connecting said member to said support for angular adjustment of said member relative to said support, a shank member having a longitudinal slot through which said pivot screw passes for longitudinal adjustment 'of said shank member relative to said pivot screw, and means carried by said rst mentioned member and engaging in said slot for holding said shank member in xed angular relation to said first mentioned member, said shank member having angularly related faces for locating top and front faces of a tool in proper Working relation to a work piece arranged substantially coaxially with said pivot screw.

LEIF FERSING.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

